Grinding-mill.



No. 746,275. PATENTED DEC. a. 1903.

J. 0. BOWSHBR.

GRINDING MILL.

APPLICATION FILED DBO. 2, 1901- I I0 MODEL. 5 SHEETS-SHEET 1.

WW 0 k/m M PATEN'IED DEG. s, 1903;

No. 746,275. v

' J. G. BOWSHER.

GRINDING MILL. I APPLIGATION FILED DEG. 2,1901.

5 sums-sum z.

170 MODEL.

Tun nonms PETERS o0. Pncn'uu'mdu WASHINGTON, n. c

No. 746,275. PATBNTED DEC. 8, 1903.

J. G. BO-WSHER.

GRINDING MILL.

APPLICATION FILED 1330.2, 1901.

NO MODEL. 5 SHEETS-SHEET 3.

(AMY A I 5mm? z dnwwq No. 746.275. .PATENTED DEG.8,1903.

J. G. BOWSHBR. GRINDING MILL.-

APPLIOAT ION PILED'DEO. 2, 1901. I N0 MODEL. 5 SHEETS-SHEET 4.

No. 746,275. PATBNTED DEC. 8, 1903. J. 0. BOWSHER.

. GRINDING MILL.

APPLIUATION FILED 13110.2, 1901.

N0 MODEL. 5 S HEET SSHBET 5.

y MMZQ Q I I W g No. 746,275.

UNITE STATES V Patented December 8, 1903.

PATENT OFFICE.

GRINDING-MILL.

SPECIFICATION formingpart of Letters Patent No. 746,27 5, dated December8, 1903.

Application filed December 2, 1901. Serial No. 84,310. (No model.) I

To alfiwhom. it may concern: 7 Be it known that I, JAY C. BOWSHER, acitizen of the United States, residing at South Bend,'in the county ofSt. Joseph and State of Indiana, have invented certain new and usefulImprovements in Grinding-Mills; and

thereon, which form. a part of this specifica--' tion.

My invention relatesto improvements in. feed-mills, and has particularrelation to machines in which the husk, cob, and grainare groundtogether.

I The general object of my invention is to provide a machine especiallyadapted for grinding Kafir corn or maize and inwhich the nnhusked ear isfed into the mill, being subjected successively to'mechanisinwhich willfirst cut and remove, the husk and fine matter forming the head 'ofKafir corn, break up the cob, and finally grind the comminutedparticles'to the desired degree of fineness... The ground material isthen passed into a suitable'bin arranged below the mill.

The grinding of Kafir corn and coarse material, such as ordinary maize,before it has been husked is a somewhat difficult matter, owing tothe'nature of the material to be operated upon. The advantageoffdispensing with an independent husking is readily understood therebeing not only a saving of time, but also the additional presence of thehusk in. the final product. So far as I am aware this result has notbeen obtained-with this class of machines, and itis to produce a millfor this purpose that the present invention is provided. I Inaccomplishing'this result it is necessary that not only is there arequirement of mechanism for performing the several steps above referredto, but that.

there must he provided means for adjustably controlling the relativepositions of the several parts in order that there may be properdivision of the work in theseveral steps to finally produce the desiredresult so far as the fineness of the material is concerned.

A further object therefore is to provide ration of the same.

special means for adjustahly controlling the relative positions of theacting parts.

A further object is the provision of special mechanism for breaking upthe cob; and,

finally, the object is to provide detailed constructions which cooperateto produce the steps above referred to.

To these and other ends, the nature of which will be hereinafter readilyunderstood as the invention is pointed out, said invention consists inthe improved c'onstr-uction and combination of parts for accomplishingthe above-mentioned objects, as hereinafter .fully described,illustrated in the accompanying drawings, and particularly pointed outin .lthe appended claims.

In the drawings, Figure 1 is a vertical sectional view of the mill. Fig.2 is a horizontal sectional view taken on the line 2 2 of Fig.1. Fig. 3is a horizontal sectional view taken on the line 3 3 of Fig. 1 lookingin the direction of the arrow. Fig. 4 is a horizontal sectional viewtaken on the line 4401* Fig. 1. Fig. 5 is a similar view on the line 5 5of, Fig. 1. Fig. 6 is a detail view of the rotating grinding-cone; Fig.7 is a detail view of the squaredriving-shaft which" carrice thegrinding-cone. Fig. 8 is anend ele- Fig. 9 is adetail view of the spiralcrusher and showing the cutting plate secured thereto. Fig. 10 is adetail view-of the shearing-cutters and the keeper carried by therotating cutter, these parts being. shown separated. are detail views'ofthe adjusting mechanism.

Fig. 14 is an enlarged sectional v'iewtaken at right angles to Fig. l. I

5 designates a base-plate secured in suitable manner over the box or bin6, the latter being of suitable size and construction. Projecting fromthe upper face of the base-plate 5 are a series of pins 7,.formingshafts for gear-wheels 8, the latter being arranged ina circle aroundand adapted to mesh with a ,pinion 9, carried by the central shaft 10'.As shown in dotted lines in Fig. 2, there are three gear-wheels 8. Eachof said gear-wheels 8 is provided with a pinion 11, preferably Figs. 11,12, and 13 formed integral therewith, said pinions be ing adapted tomesh with a master or bull wheel 12. The shaft 10 is preferably squarein cross-section excepting at its lower end, i

where it is stepped into the base-plate, and as the pinion 9 is providedwith asquared opening it will be readily understood that a movement ofthe master or bull wheel 12 will communicate a rotary movement to theshaft 10.

13 designates a circular plate which rests on the upper ends of the pinsor shafts 7, to which it may be secured, and of a size adapted to extendover the teeth of the masterwheel 12, said plate serving to hold thegearwheels 8 and master-wheel in position. Projecting upwardly from saidplate is an annular flange 14, while the central portion of the plate iscut away, as shown at 15, and intermediate of the flange 14 and saidcut-away portion are arranged suitable openings 16, adapted for thepassage of the ground material to the box or bin 6. Mounted on the shaft10 is a semispherical portion 17, from which project laterally wings 18,the latter being adapted to sweep over the surface of the plate 13Within the flange 14, the space between said flange 14 and the portion17 forming a collecting-chamber for the meal as it comes from thegrinding mechanism.

19 designates the grinding-shell, which is secured to the upper surfaceof the flange 14. Said shell is flared, as shown, having on its innersurface a suitably-arranged grindingface, the latter being of anypreferred construction.

As shown in Fig. 1, the shaft 10 is substantially short, extending but ashort distance above the portion 17. The upperend of said shaft isadapted to fit Within a squared opening 20, provided in the lower end ofa square driving-shaft 21, as shown in Figs. 7. and 8. The lower end ofthe shaft 21 is provided with projecting lugs 22, (shown in Figs. 7 and8,) adapted to eoact with similar lugs 23, formed on the under side ofthe grinding-cone 24, said cone being mounted on a rounded portion 25 onthe shaft 21, as shown in Figs. 1, 7, and 14.

The upper end of the shaft 21 is round and provided with screw-threadsarranged close to form a fine adjustment with the lower end of a tubularregulating-shaft 26, the latter extending vertically and having at itsupper end a feather 27, adapted to rest within a slot 28, formed in thesleeve 29. Said sleeve is adapted to pass over the tubular shaft 26,being supported thereon by means of the spring 30, as shown in Fig. 1.The upper end of said sleeve is notched or serrated, as shown in Fig.12, and adapted to form a lockingseat for a pin 31, projecting laterallyfrom the upper end of a rod 32, the latter extendng through the sleeve29, the tubular shaft 26, and the shaft 21, each of these parts beingprovided with a longitudinal opening for the passage therethrough ofsaid rod. Said rod has its lower end screw-threaded, by means of whichthe nut 33 may be applied thereto. The lower end of said rod 32 passesinto the opening 20 of the shaft 21, and the nut 33 is of a size to fitthe openingin a manner to prevent its rotation independentof therotation of said shaft. The upper end of said rod 32 is adapted toreceive a hand-wheel 34, the boss of which is provided with recessesadapted to receive the pin 31, the connection being a removable one.

It will be readily seen that the rod 32 will be normally held fromrotation by the notches or serrations on the end of sleeve 29, saidnotches or serrations, however, being sufijciently shallow to permit ofthe rotation of rod 32 when pin 31 is engaged by wheel 34. The rotationof rod 32 will cause nut 33 to travel up or down, and thereby raise orlower the shaft 21, with the result that the grinding-cone 24 isadjusted to its proper position relatively to the shell 19.

35 designates the crusher bowl, which is bolted or otherwise secured tothe shell 19, said bowl being flared, as shown. The interior surface ofsaid bowl is of a rib formation.

40 designates a crusher formed with spirally-extended cutting membersand having a steel cutting-plate 41 of suitable configuration secured toits lower face. As shown, said plate 41 is provided with a squareopening which is adapted to substantially fit the shaft 21, the cutterand crusher being carried by said shaft, the cutting-plate resting onand coacting with the cutter 39.

The upper end of the crusher 40 is provided with a reduced portionforming a hub arranged to enter an opening in the stationary member 42of the shearing-cutter, said member having radially-extended wingsresting on seats 37, formed on the inner face of bowl 35. The member 42is prevented from rotating by means of lugs 38 engaging recesses 43,formed in said wings.

44 designates the rotating member of the breakers,being formedsubstantiallyas shown in Fig. 10, having the laterally-extending wings45. The hub portion of the member 44 is reduced in thickness and isprovided with openings adapted to receive pins46, car ried bythe keeper47, said keeper being adapted to fit over an angular portion of tubularshaft 26 and by the pin connection with the member 44- prevent relativerotation of the shaft 21 and tubularshaft 26, the member 44 beingcarried by and rotating with the shaft 21. By this construction andarrangement of parts it will be seen that the shaft 21 carries all ofthe moving parts and that the degree of closeness to which these partscan be brought is adjustably controlled by the tubular shaft 26, thelower face of which abuts on the hub of the member 44. Thus if it isdesired that the cutting-plate 41 of cutter 39, together with the twomembers of the breakers, are to be brought closer together the keeper 47is raised and the application of a wrench to the tubular shaft 26 and atightening of said not will force member 44 downward against member 42and bring said parts into closer relationship Without disturbing therelative positions of the grindingcone and theshell 19. At thesarnetimesaid member 44 bearing upon the top of crusher 40 forces the latter downcloser against plate 39. During such adjustment the sleeve 29, movingwith said-tubular shaft,will not affect the position of the-rod 32,reason of the springthereby-permitting the parts to run freer.

As will be readily seen,all of the active parts Q are, by reason of thelocation of the nut 33 within the opening 20, carried by said nut, andas said nut is carried by the screwthreaded end of the rod 32, restingon the upper end of the shaft 10, said parts are supported with anadjustable connection therebetween, by the shaft 10. v

An especial feature of thisinvention is the general configuration of thebowl 35. As shown in Figs. 4 and 5, it will be seen that while thecrusher has ageneral contour which is circular the bowl 35 is arrangedwith a curve tangential to that of the crusher, thereby forming onopposite sides a space which gradually decreases to a point of closeproximity to the path of movement of the crusher. By this means greaterfacility is given to the action of the crusherin cooperating with theribs of the bowl to crush the cob.

48 designates a hopper resting on the bowl 35. Said hopper is providedwith a continuous rib 49, arranged spirally and extending from theentrance of thehopper to the point of exit.

In operation the unhusked material is placed in the hopper, and as itpasses downward, due to the presence of the continuous spiral rib 49, itis caught up by the member 44 of the breakers, which coacting with themember 42 tears away the husk,as well as the finer particles at the headof Kafir corn. The material then drops into the crusherbowl,where it ismoved around under the action of the coacting crusher and bowl until thematerial is comminuted, finally passing through and subjected to theaction of the parts of the comminuted cob as may come in contact withthe cutter. As it drops from the cone it passes into thecollecting-chamher, from where under the action of the wings 18it passesthrough openings 16 into the box or. bin 6.

Changes in the form and construction of- ,parts may be made'withoutdeparting from the spirit of'said invention in-so far as said changesmay fall within the scope of the claims hereto appended.

Having described my invention, what I claim isj com prising acrusher-bowLa rotating crusher, i i crusher, and cutting mechanismindependent of said crusher-bowl, and said-grinding mechanism andinterposed therebetween.

2. A'mill for grinding unhusked maize comprising crushing mechanism and,grinding mechanism arranged in superposed relation, and cuttingmechanism independent of said crushing and grinding mechanism andlocated therebetween. 1

3. Amillfor grinding unhuslied maize com- 1. A feed-m-ill forlgrindinguuhusked maize Q mechanism located below said prising crushingmechanism, grinding mecha'nism located below the same, cutting mechanismindependentofsaid crushing and grind ing mechanism and interposedtherebetween, and breaking mechanism located above said crushingmechanism. 7

4. Amill comprising a drive-shaft formed of upper and lower sectionsresting oneupon the other, a grinding-cone carried by one of saidsections, and means for adjusting the sections of said shaft relativelyto each other, whereby the grinding-cone may be moved longitudinally ofthe shaft.

.5, A mill comprisinga grinding-cone,an adjustable support therefor, agrinding-shell, crushing mechanism located above said grind-- ing coneand shell, cutting mechanism ar-" ranged below and breaking mechanismarranged above said crushing mechanism, and means for adjusting therelative positions of said breaking and cutting mechanisms.

6. .In a feedmill, a drive-shaft, a hollow shaft telescoping therewith,a grinding-cone mounted on said hollow shaft, a rod extending throughsaid hollow shaft and resting upon said drive-shaft, a nut carried bysaid rod and too adapted to support said hollow shaft, and.

means for rotating said rod to adjust the position'of said nut. L

7. A feed-mill comprising a drive-shaft, a

tubular shaft provided with an enlarged head arranged to receive one endof said driveshaft, a grinding-cone mounted on said tubular shaft,anadjusting-rod extending through said tubular shaft, and a nut carriedbysaid rod.

8. A feed-mill comprising a drive-shaft, a tubular shaft, having itslower end provided with an enlarged head adapted to receive one end ofsaid drive-shaft, lugsprojecting from said head, a grinding-cone mountedon said tubular shaft and also having lugs coacting with said formerlugs, an adjusting-rod extending through said hollow shaft and restingon said drive-shaft, and a nut located within said head and working onsaid rod.

9. A feed-mill comprising a drive-shaft, a tubular shaft engaging saiddrive-shaft and end, a stationary breaking member located near the upperend of said bowl, and a driveshaft having a crusher, an independentcutting-plate secured to said crusher and a breaking member adapted tocooperate respectively with said bowl, cutter, and stationary breakingmember.

In testimony whereof I aifix my signature in presence of two witnesses.

JAY O. BOWSHER.

Witnesses:

JAMES DUSHANE, EDWARD F. DUBAIL.

